From 65bc037b5d7c5ad9811a90fd60ac27094fb6a0eb Mon Sep 17 00:00:00 2001
From: Chia-Sheng Chen <chiache@microsoft.com>
Date: Fri, 3 Apr 2020 17:56:08 +0800
Subject: [PATCH] Supplement the document of fn as_ptr

---
 src/base/matrix.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/base/matrix.rs b/src/base/matrix.rs
index 1fb93fea..9004b331 100644
--- a/src/base/matrix.rs
+++ b/src/base/matrix.rs
@@ -308,6 +308,15 @@ impl<N: Scalar, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
     ///
     /// If the matrix is not empty, this pointer is guaranteed to be aligned
     /// and non-null.
+    ///
+    /// # Example
+    /// ```
+    /// # use nalgebra::Matrix2;
+    /// let m = Matrix2::new(1, 2,
+    ///                      3, 4);
+    /// let ptr = m.as_ptr();
+    /// assert_eq!(unsafe { *ptr }, m[0]);
+    /// ```
     #[inline]
     pub fn as_ptr(&self) -> *const N {
         self.data.ptr()